21307816

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1361}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 42494400

約数和(自身を除く): 21186584

約数列:

[1, 2, 4, 8, 19, 38, 76, 103, 152, 206, 412, 824, 1361, 1957, 2722, 3914, 5444, 7828, 10888, 15656, 25859, 51718, 103436, 140183, 206872, 280366, 560732, 1121464, 2663477, 5326954, 10653908, 21307816]

約数ペア:

[(1, 21307816), (2, 10653908), (4, 5326954), (8, 2663477), (19, 1121464), (38, 560732), (76, 280366), (103, 206872), (152, 140183), (206, 103436), (412, 51718), (824, 25859), (1361, 15656), (1957, 10888), (2722, 7828), (3914, 5444)]